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PCA9544AGQNR Datasheet

  • PCA9544AGQNR

  • 4-CHANNEL IC AND SMBus MULTIPLEXER WITH INTERRUPT LOGIC

  • 572.10KB

  • 23页

  • TI

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PCA9544A
4-CHANNEL I C AND SMBus MULTIPLEXER
WITH INTERRUPT LOGIC
2
www.ti.com
SCPS146A 鈥?OCTOBER 2005 鈥?REVISED OCTOBER 2005
FEATURES
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1-of-4 Bidirectional Translating Switches
I
2
C Bus and SMBus Compatible
Four Active-Low Interrupt Inputs
Active-Low Interrupt Output
Three Address Pins, Allowing up to Eight
Devices on the I
2
C Bus
Channel Selection Via I
2
C Bus
Power Up With All Switch Channels
Deselected
Low R
ON
Switches
Allows Voltage-Level Translation Between
1.8-V, 2.5-V, 3.3-V, and 5-V Buses
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No Glitch on Power Up
Supports Hot Insertion
Low Standby Current
Operating Power-Supply Voltage Range of
2.3 V to 5.5 V
5.5-V Tolerant Inputs
0 to 400-kHz Clock Frequency
Latch-Up Performance Exceeds 100 mA Per
JESD 78
ESD Protection Exceeds JESD 22
鈥?2000-V Human-Body Model (A114-A)
鈥?200-V Machine Model (A115-A)
鈥?1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
The PCA9544A is a quad bidirectional translating switch controlled via the I
2
C bus. The SCL/SDA upstream pair
fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is
determined by the contents of the programmable control register. Four interrupt inputs (INT3鈥揑NT0), one for each
of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the four interrupt inputs.
A power-on reset function puts the registers in their default state and initializes the I
2
C state machine, with no
channel selected.
The pass gates of the switches are constructed such that the V
CC
pin can be used to limit the maximum high
voltage, which will be passed by the PCA9544A. This allows the use of different bus voltages on each pair, so
that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External
pullup resistors pull the bus up to the desired voltage level for each channel. All I/O pins are 5-V tolerant.
ORDERING INFORMATION
T
A
QFN 鈥?RGW
QFN 鈥?RGY
SOIC 鈥?DW
PACKAGE
(1)
Reel of 3000
Reel of 1000
Tube of 25
Reel of 2000
Reel of 250
鈥?0掳C to 85掳C
Tube of 70
TSSOP 鈥?PW
Reel of 2000
Reel of 250
TVSOP 鈥?DGV
VFBGA 鈥?GQN
VFBGA 鈥?ZQN (Pb-free)
(1)
Reel of 2000
Reel of 250
Reel of 1000
Reel of 1000
ORDERABLE PART NUMBER
PCA9544ARGWR
PCA9544ARGYR
PCA9544ADW
PCA9544ADWR
PCA9544ADWT
PCA9544APW
PCA9544APWR
PCA9544APWT
PCA9544ADGVR
PCA9544ADGVT
PCA9544AGQNR
PCA9544AZQNR
PD544A
PREVIEW
PD544A
PD544A
PD544A
TOP-SIDE MARKING
PREVIEW
PD544A
PCA9544A
PREVIEW
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2005, Texas Instruments Incorporated

PCA9544AGQNR 产品属性

  • 1,000

  • 集成电路 (IC)

  • 接口 - 专用

  • -

  • 转换开关

  • I²C，SM 总线

  • 2.3 V ~ 5.5 V

  • 20-VFBGA

  • 20-BGA MICROSTAR JUNIOR（4x3）

  • 带卷 (TR)

  • 表面贴装

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